Djokovic Crowned Champion

The end of the ATP World Tour Finals tennis was a bit of an anti-climax last night.

Novak Djokovic is the season ending champion - but that was by default, as Roger Federer pulled out before the final because of a back problem.

Andy Murray stepped in to play for free in an exhibition match against Djokovic, which was won by the world number one. Federer apologised to fans - Djokovic says he knows it would have hurt the Swiss to withdraw.